Trip lever for oscillating magnetoes



Oct. 16, 1923. 1,410,933

A. ROSN'ER- TRIP LEVER FOR OSCILLATING MAGNETOS F11 Jan. 18 1922 INVENTOR I ADOLPH ROSNER.

91 J, lw

ATTORNEY Patented Oct. 16, 1923.

UNITED STATES PATENT OFFICE.

ADOLPII Rosunn, or SPRINGFIELD, MASSACHUSETTS, Ass GNoa To AMERICAN BoscII MAGNETO CORPORATION, or SPRINGFIELD, MASSACHUSETTS, A CORPORATION on NEW YORK.

TRIPLEVER FOR OSCILLATING MAGNETOES.

i Application filedJanuary 18 1922. Serial No. 530,142.

To all whom it may concern:

Be it known that I,-AI oLPH ROSNER, a citizen of the United States, residing at Springfield, in the county of Hampden,

State of Massachusetts, have invented certain new and useful Improvements in Trip Levers for Oscillating Magnetoes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to oscillating magnetoes for ignition systems of "internal combustion engines, and particularly tothe tripping mechanism thereof.

Heretofore, itwas customary to machine the trip lever of the oscillating mechanism from a solid piece of metal, such as a drop at) forging, in order that it could withstand the heavy and frequent blows of the actuating pin carried by a moving part of the engine. The lever also was usually formed with a solid metal yoke which was keyed to the .5 end of the oscillator shaft. In some cases thetrip lever was formed of several laminations, yet it was no lighter in weight than the machined trip lever. This required mass and weight of the trip lever gave U it considerable inertia, and owing to this inertia, the lever could not operate at very high speeds. When actuated or moved to cocking position by the actuating pin, or to normal position by the oscillating spring, the momentum of the lever would give it an overthrow at the end of the cocking movementor cause it to foul at the end of its oscillating movement. Fouling was caused by the actuator pin hitting the end of thelever before it had come to rest at normal position. The motion of thetrip lever couldnot'be quickly dampened or brought to a rapid stop after oscillation.

Its inertia further imposed great strains upon'the bearings effecting undue wearing on the bearings. I

In accordance with this part of my in-. vention, I construct the trip lever from pressed-up sheet metal with web and flange portions, which are preferably respectively disposed transversely and axially of the axis of the oscillator, with the flange portion,

extending preferably axially from the web portion. The lever is connected to the os- 'cillator, preferably by means of a hub member fastened to the oscillator, and the trip lever preferably comprises a member fastened to the oscillator, and a pressed-up sheet metal arm fastened, as by rivets, to such member. Springs also may be connected to the frame and such member for oscillating the oscillator and the lever.

With such construction, the trip lever is light "in weight and, accordingly, can be more rapidly vibrated with less inertia and momentum than previous structures. By reason of such light weight, the lever will have less over-throw'at the end of its cocking movement, will follow the actuating pin more closely during such movement. will become more rapidly dampened and will not so readily foul at the end of its oscillating movement. Since the chance of foul ing is reduced, a longer trip lever may be used with the effect that less strains are imposed upon the bearings and hence, greatly reducing the wear on the bearings. Moreover, such constructions may be made at less cost than machined, drop forgings or laminated structures.

-In' the accompanying drawing illustrating my invention in application, as an example, to an oscillating type of magneto:

Fig. 1 is a view in elevation of an end of a magneto employing my invention; Fig. 2 is a fragmentary sectional view of the trip lever and associated parts; Fig. 3 is an end view of the same and a striking pin, showing different positions of operation; and Figs. 4 and 5 are top plan and end views of the device as applied to an oscillating magneto having laterally extending oscillating springs.

Referring more particularly to the illustrations upon the drawing, the invention is shown applied to a, magneto 1 having a frame 2 carrying a Ushaped magnet 3 fastened thereto by means of screws 4. To the end of the frame 2 is formed an integral extension 5 to which is secured. in any suitable manner,-an oscillating spring housing 6 comprising an outer cylindrical member 7 and an inner similar member 8 telescopingwith the member 7. The extension 5 has an upwardly extending portion 9 to which is fastened. by means of screws 10. a collector brush holder 11, a binding post button 12 s'urmounting this holder. Within the magneto rotatahl v supported an armrc having the end portion 13 of 'ough the housing 6 and is ta ered to rec-Liv. V hub .ziQl'flllCI' l4: held. 7 1 a \Voodruff huh in i ll being held in 2. position by a l6 and lock washer l? connected to the threaded end of the shaft. The hub member ll: has a radial extendi portion 18 which flat and substantial y circular. This portion 18 has secured it the member 8, and also a trip lever l9. hv means of rivets 20, these rivets cxtendi through apertures formed in the member l8 and headed at lit/(l1 ends to secure the memhcrs S and 19 on opposite sides of the portion 18 of the hub member 14.

The iii nher 8 is in the form of an annular hannel. and. together With the member 7, a housing for oscillating: springs 21, which mm 0 of anv suitable form. such as spiral or concentric incinliiers. The trip lover constructed of pressed-up sheet steel and comprises a Web portion 22 extending transvcrselv of the shaft of the armature, and a flanged portion extending from this Web portion. axially of the shaft of the armature. The web portion 22 is of substaniiallv circular form. but has a depending extehsion Q-l of triangular form which, toglttlifl with the lower extending portions 25 of the flange form the depending arm of the trip lever. he arm extends dovvndiv in the path of an actuating pin 26 'ried by a. moving or rotating part of the en ine upon which the magneto is installed and to which it furnishes ignition. In Fig. 3 of the drawing the actuating pin 26 is shown. in full lines, in the position of initial contact with the arm of the trip lever. and in dotted lines. at substantially the final position of contact. with said arm. The dotted line position of the arm. as shown in 3. is the position usuallv referred to as a rocking position. after which, when the pin releases the arm, the springs will oscillate the trip lever, as Well as the armature, to its or ginal position. such as that shown in full lines in Fig. 3 of the drawing. Where tin read for its next actuation by the pin 26.

lo. Fins. and. 5 is shown a similar maglaterally extending springs 27 su orted upon l s 28 formed integrally act 29 secured, in an suitable orins L man er. to the end of the magneto. These s are of helical form and have then;

bore 1%. trip lever is constructed exactly the same as in the illustrations shown in Figs. 1 and 2 of t e drawing. lVhen the trip lever is deheart the pins 33 and the rollers 32 receive an angular movement effecting a tension n the spri 27 until the lever has --...ich i cocking position. It: then is released by he tuating pin 26, and thesprings 2t nnnicz. ztely act to return the trip lever,

ing web and flange portions, and aspring operative to oscillate said oscillator.

2. magneto comprising a frame, an oscillator, a pressed-up sheetmetal trip lever fastened to said oscillator and comprising a web portion disposed transversely to the axis of said oscillator and a flange portion extending from said Web portion axially of said oscillator, and a spring operative to oscillate said oscillator.

3. magneto comprising a frame. an oscillator. a trip lever comprising a member fastened to said oscillator and a pressed-up sheet-metal arm fastened to said member and ha ring vreb and flange portions. and a spring operative to oscillate said oscillator.

l. A magneto comprising a frame, an oscillator having a shaft, a trip lever complising a hub member fastened to said shaft and a pressed-up sheet-metal arm c0mn sing a. web and flange portions, rivets fasulllllg the web portion of said arm to said hub member. and a spring operative to oscillate said oscillator.

5. A magneto comprising a frame, an oscillator. a trip lever comprising a member fastened to said oscillator and a pressed-up sheetanetal arm having web and flange portions. rivets fastening said arm to said member. and a spring operative to oscillate said oscillator.

6. A magneto comprising a frame. an oscillator, a pressed-up sheet-meta1 trip lever connected to said oscillator and comprising 'WElO and flange portions, and springs connected to said lever and said frame and operative to oscillate said oscillator.

T. magneto comprising a frame, an oscillator. a trip lever comprising a member tencd to said oscillator and :1 pressed-up sheet-metal arm fastened to said member and comprising Web and flange portions, and springs connected to said frame and said piember and operative to oscillate said oscilator.

8. A magneto comprising a frame, an ossaid oscillator, and a flanged portion excillator, a pressed-up sheet metal trip lever tending from said Web portion axially of comprising a hub member fastened to said said oscillator, and springs connected to 1 oscillator and an arm fastened to said hub said frame and said hub member and opera- 5 member, rivets fastening said arm to said tive to'oscillate said oscillator and trip lever.

hub member, said arm comprising a web In testimony whereof I aflix my signature. portion disposed transversely of the axis of ADOLPH ROSNER. 

